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Diesel Engine Turbocharger Stabilized With Novel Tilting Pad Bearing Design

[+] Author Affiliations
R. Gordon Kirk, Matthew Enniss, Daniel Freeman, Andrew Brethwaite

Virginia Tech, Blacksburg, VA

Paper No. IJTC2012-61041, pp. 217-219; 3 pages
  • ASME/STLE 2012 International Joint Tribology Conference
  • ASME/STLE 2012 International Joint Tribology Conference
  • Denver, Colorado, USA, October 7–10, 2012
  • Conference Sponsors: Tribology Division
  • ISBN: 978-0-7918-4508-0
  • Copyright © 2012 by ASME


Many high speed turbochargers operate with limit cycle vibration as a result of fluid-film instability. This problem has been under investigation for the past seven years. Only now has a turbocharger with fluid film bearings been run to full speed and loaded, with essentially no bearing induced sub-synchronous vibration. The goal of this research was to have a stable synchronous response with a minimum of non-synchronous contribution excited only by the engine dynamics and exhaust pressure pulsations. Previous papers have documented experimental results of the fixed geometry bearing designs. This paper documents a new, modified tilting pad bearing concept that has replaced the fixed geometry bushings with minimal modifications to the stock bearing housing. The summary of the on-engine testing over the past year is documented in this paper.

Copyright © 2012 by ASME



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